Comments by "GH1618" (@GH-oi2jf) on "How ELECTRICITY works - working principle" video.

  1. The multiplier is 10^18.
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  2. It is more accurate to say the free electrons drift. They are moving all over the place, but there will be a net drift of electrons in an active circuit. They don’t move very far in an AC circuit.
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  3. An accurate physical model is beyond the scope of the subject, in my opinion. Practical electricity does not require an understanding of the physics. I agree that a bad model should not be presented. What is the point in that?
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  4. No, Earth is not hollow. Consult a book on geology.
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  5. ⁠ @sulkel — Almost right. A Coulomb is 6.24 x 10^18 units of electric charge. An Ampere is a net charge movement of one Coulomb per second.
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  6. Free electrons do move quickly, but they are moving all over the place. In the presence of a potential difference, there will be a net movement, called drift, and that is relatively slow. Free electrons cannot move very far in one half-cycle. The moving charge interacts with the field. It is the field that transfers the energy.
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  7. Correct. One of several errors in this video.
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  8. A hydroelectric generator comprises a turbine, a rotor, and a stator. The turbine is caused to rotate by the flow of water. The rotor contains coils of wire which are energized to make an electromagnet. The rotor is caused to turn by the turbine. The rotor turns inside the stator, which contains more coils. The rotation of the electromagnet next to the stator coils induces an AC voltage in the coils, which causes power to be distributed through the network of transmission lines.
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  9. Yes, it is a primitive model which is different from the modern model. There is some misinformation when he tries to give a physical description of what is happening. It isn’t necessary to understand the physics of electricity in order to make practical use of it. I think it is better to just use a practical model which does not pretend to be a physical model, than to present an incorrect physical model, but the owner of the channel may do what he pleases with it.
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  10. It is a property of certain subatomic particles. Charged particles act according to Coulomb’s Law.
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  11. Consult the codes and take your plan to your electrical inspector for approval.
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  12. The electrons and the field interact. It is better to consider the net electron motion as “drift”. The drift is not fast, but the propagation of the field is.
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  13. The free electrons actually move only a short distance in one-half cycle.
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  14. I don’t think that is a good way of looking at it at all. If you are not going to get into the physics of electricity, then it is better to just take a practical approach.
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